| 江苏省溧阳梅岭玉(软玉)的宝石学研究 |
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| 引用本文： | 何明跃,朱友楠,李宏博.江苏省溧阳梅岭玉(软玉)的宝石学研究[J].岩石矿物学杂志,2002,21(Z1):99-104. |
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| 作者姓名： | 何明跃 朱友楠 李宏博 |
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| 作者单位： | 中国地质大学,北京,100083 |
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| 基金项目： | 国家科技基础性工作专项资助项目(2001DEA10008) |
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| 摘 要： | 江苏省溧阳市南部小梅岭地区的梅岭玉(软玉)产于花岗岩和大理岩的外接触带中.通过野外地质调查、室内显微镜和扫描电子显微镜观察和分析、X射线粉晶衍射物相分析、电子探针成分分析和物理性质测定表明梅岭玉的主要矿物组成为透闪石,含有少量磁铁矿和粘土矿物,具纤维状变晶结构;梅岭玉中透闪石的主要化学组分为SiO2、MgO、CaO,次要组分Na2O、P2O5的含量明显高于和田玉中透闪石;玉石的颜色可分为白色、青白色和青色,随Fe2+含量增加颜色加深,半透明至不透明,玻璃光泽,平均密度为2.99 g/cm3,硬度5～6,折射率1.61(点测).梅岭玉的特殊内部结构使其块度较大、裂隙较少,具有较好的加工工艺性.
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| 关 键 词： | 梅岭玉 软玉 透闪石 纤维状变晶结构 溧阳 江苏 |
| 文章编号： | 1000-6524-(2002)-S0-0099-06 |
| 收稿时间： | 2002/7/15 0:00:00 |
| 修稿时间： | 2002年7月15日 |
Gemmological characteristics of Meiling jade from Liyang, Jiangsu Province |
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| HE Ming-yue,ZHU You-nan and LI Hong-bo.Gemmological characteristics of Meiling jade from Liyang, Jiangsu Province[J].Acta Petrologica Et Mineralogica,2002,21(Z1):99-104. |
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| Authors: | HE Ming-yue ZHU You-nan and LI Hong-bo |
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| Institution: | China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China |
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| Abstract: | Meiling jade (a natural nephrite), derived from Xiaomeiling region in Liyang, Jiangsu Province, occurs in the outer contact zone between granite and marble. Besides field geological investigation, the methods of microscope and SEM (scanning electron microscope) observation, X-ray diffraction, electron microprobe analyses and determination of physical qualities are adopted for the study. The results show that the main mineral constituent is tremolite with nematoblastic texture, and a little magnetite and clay mineral. The main chemical components of tremolite are SiO2, MgO and CaO, the minor components are Na2O and P2O5, the contents of these components are higher than those in Hetian jade. Colors of Meiling jade are mostly white, grey-white and grey, the colors become darker as the content of Fe2+ increases. The jade is semitransparent or opaque, with vitreous luster, the average density is 2.99 g/cm3, the hardness is 5~6, and the refraction index is 1.61. Due to special texture, Meiling jade with large pieces and few cracks shows a good technological processing property. |
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| Keywords: | Meiling jade nephrite tremolite nematoblastic texture Liyang Jiangsu |
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